The nation that will insist upon drawing a broad line of distinction between the fighting man and the thinking man is liable to find its fighting done by fools and its thinking by cowards.
-- Sir William Francis Butler

Switch: How to Change Things When Change Is Hard

Psychologists have discovered that our minds are ruled by two different systems - the rational mind and the emotional mind - that compete for control. This tension can doom a change effort - but if it is overcome, change can come quickly. In Switch, the Heaths show how everyday people have united both minds and, as a result, achieved dramatic results.